API 682 PLAN 52

API 682 Plan 52 is used to contain emissions produced from the primary inboard seal of a dual unpressurized wet mechanical seal arrangement. The process fluid being sealed has a typically higher vapour pressure than atmospheric pressure at process temperatures.

This flush plan consists of a reservoir (seal pot) which contains a clean compatible buffer fluid. The reservoir operates at essentially atmospheric pressures with buffer fluid circulated from the mechanical seal via the internal pumping ring. Process leakage vaporizes in the reservoir and the system is connected to the facilities vapour recovery unit or flare. Transmitters are used to monitor buffer fluid level and reservoir pressure.

Standard Design Features Optional Design Features
  • ASME Sec. VIII Div. 1, 2013
  • 8” Sch. 40 Reservoir: 5-Gallon
  • Weld Pad w/ #7 Sight Glass
  • Elliptical Heads
  • Cooling Coil: 1/2’’ x .065 Wall
  • Pressure Transmitter
  • Level Indicating Transmitter
  • Threaded Connections
  • Class 800 OS&Y Gate Valves
  • Paddle Orifice
  • Pressure Gauge
  • Block & Bleed Valves
  • ASME U Stamp
  • 8’’ Sch. 80 Reservoir: 10-Gallon
  • Dual Weld Pad w/ #5 Sight Glass
  • Flanged Lower Head
  • Point Level Switch
  • Pressure Switch
  • Socket Welded Connections
  • Flanged Connections
  • Gusseted Supports
  • External Circulating Pump
  • Support Stand

*All materials used per ASME Section VIII Div. 1